<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
</head>
<style type="text/css">
    div {
        background-color: rgb(237, 236, 250);
        border: 1px dashed #ccc;
    }

    .top{
        width: 960px;
        height: 200px;
        margin:0 auto;
    }

    .banner{
        width: 960px;
        height: 80px;
        margin:10px auto;
    }
    .main{
        width: 960px;
        margin:10px auto;
        border:0;
        background-color: transparent;
    }
    .clearFix:after{
        content: "";
        display: block;
        clear:both;
    }
    .left{
        float: left;
        width: 300px;
        height: 250px;
    }
    .right{
        float: right;
        width: 650px;
        height: 250px;
    }
    .footer{
        width: 960px;
        height: 150px;
        margin:0 auto;

    }
</style>

<body>
<div class="top"></div>
<div class="banner"></div>
<div class="main clearFix">
    <div class="left"></div>
    <div class="right"></div>
</div>
<div class="footer"></div>
</body>
</html>